Abstract
BackgroundMechanochemical-assisted extraction (MCAE) and mechanochemical-assisted enzyme catalysis (MCAEC) methods were developed for extraction and enzymatic hydrolysis of calcium phytate from defatted rice bran, respectively.ResultsThe MCAE conditions were optimized by response surface methodology: 10% sodium carbonate as the solid reagent, 33 min grinding time, 18:1 ball–material ratio, 330 rpm ball milling speed, and pH 5.5 extraction. Under these conditions, the yield of calcium phytate was 97.0 mg/g. The MCAEC conditions were optimized as follows: 2% enzyme addition, MM400 milling time 36 min, PM400 milling speed 262 rpm, MM400 milling frequency 27 Hz, and the addition of pH 5.5 sodium acetate buffer 3 mL. Under these conditions, the hydrolysis rate of calcium phytate was 39.7%.ConclusionCompared with traditional extraction and enzymatic hydrolysis methods, MCAE and MCAEC could obtain higher yields and hydrolysis rates, respectively.Graphical
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